Patents by Inventor Hiroshi Kageyama
Hiroshi Kageyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8624507Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: GrantFiled: January 3, 2013Date of Patent: January 7, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
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Patent number: 8493307Abstract: To realize a random number generating circuit that is optimum for a liquid crystal display device that is used in a terminal device that includes a display/input component. A liquid crystal display device includes a liquid crystal display panel, a control circuit and a random number generating circuit, the random number generating circuit comprises plural shift registers, an output circuit and a register that stores an initial value, and the random number generating circuit is equipped with plural initial values, whereby the randomness of the random numbers is improved. Further, it becomes possible to increase and output frequencies by the output circuit because it is possible to output respectively different random numbers from the plural shift registers.Type: GrantFiled: December 17, 2008Date of Patent: July 23, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Noboru Kataoka, Fumiaki Komori, Takashi Watanabe, Futoshi Furuta, Hiroshi Kageyama
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Publication number: 20130181618Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: ApplicationFiled: January 3, 2013Publication date: July 18, 2013Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.Inventors: Naoki TOKUDA, Hiroshi KAGEYAMA, Masamitsu FURUIE
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Patent number: 8487911Abstract: An image display apparatus with image entry function capable of high-speed and high-accuracy direct screen entry without increasing the peripheral circuit scale or the number of circuit elements for each pixel that lower the pixel aperture ratio. A first pixel circuit and a second pixel circuit are alternately arrayed horizontally. First and second data lines are connected to a data driver and a sensor signal processor circuit. Selector switches are connected to the input terminal of the data driver. Gray scale voltages are sent from the data driver to the first and second data lines, and first and second photo sensor signals are sent to the sensor signal processor circuit.Type: GrantFiled: December 18, 2007Date of Patent: July 16, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masayoshi Kinoshita, Hiroshi Kageyama
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Patent number: 8456401Abstract: The gate electrode is formed above the polycrystalline semiconductor layer through the gate insulating film. The polycrystalline semiconductor layer includes a first region overlapping with the gate electrode in plan view. The first region is sandwiched between the second region and the third region. The second region of the polycrystalline semiconductor layer includes a first impurity diffusion region and two second impurity diffusion regions opposite in conductivity type to the first impurity diffusion region. The first region and the first impurity diffusion region are in contact with each other at a first boundary. The first region and the two second impurity diffusion regions are in contact with each other at second boundaries. The two second impurity diffusion regions sandwiching the first impurity diffusion region are provided along the gate electrode. Thus, a leak current is suppressed.Type: GrantFiled: August 7, 2008Date of Patent: June 4, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Katsumi Matsumoto, Kozo Yasuda, Yasukazu Kimura, Takuo Kaitoh, Toshihiko Itoga, Hiroshi Kageyama
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Patent number: 8446343Abstract: An image display apparatus capable of effecting displays high in both reliability and luminance. With the image display apparatus, a transistor switch is provided between a light emitting device and a drive transistor, and a voltage value expressed by formula (a gate voltage at an on-time of the transistor switch)—(the threshold voltage Vth of the drive transistor) is rendered smaller than a value of a voltage applied to a common electrode of the light emitting device.Type: GrantFiled: December 12, 2005Date of Patent: May 21, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hajime Akimoto, Hiroshi Kageyama
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Patent number: 8436841Abstract: A display apparatus includes data lines, scanning lines arranged to cross the data lines, and pixel circuits aligning along the data lines and the scanning lines, such that one of the pixel circuits corresponds to each intersection between the data lines and the scanning lines. In addition, image signal lines transmit image signals, and switches connect the data lines to the image signal lines so that each of the data lines is connected to one of the image signal lines. The data lines are arranged such that adjacent data lines form a pair of data lines, and adjacent pairs of data lines are spaced apart from each other by two columns of pixel-circuits. Respective data lines of the pair of data lines are connected by the switches to two different image signal lines, and the switches connecting the pair of data lines to corresponding image signal lines are activated simultaneously.Type: GrantFiled: November 16, 2009Date of Patent: May 7, 2013Assignees: Canon Kabushiki Kaisha, Hitachi Displays, Ltd.Inventors: Hiroyuki Maru, Masami Iseki, Fujio Kawano, Tatsuhito Goden, Takanori Yamashita, Kouji Ikeda, Takeshi Izumida, Hiroshi Kageyama
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Patent number: 8416202Abstract: The present invention realizes the reduction of cost of a display device having a touch panel. The display device having a touch panel includes a display panel, and a touch panel which is arranged on the display panel in an overlapping manner in plane. The touch panel includes a first substrate and a second substrate which are arranged to face each other with spacers sandwiched therebetween, and a first semiconductor chip which is mounted on the first substrate.Type: GrantFiled: February 11, 2009Date of Patent: April 9, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hajime Akimoto, Yasuharu Yatsu, Hiroshi Kageyama, Noriharu Matsudate, Naruhiko Kasai
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Patent number: 8380124Abstract: A communication system by electrostatic coupling and electromagnetic induction includes: a first transmission part (3a) and a first reception part (3b) which exchange data therebetween through non-contact communication using electrostatic coupling; a second transmission part (4a) and a second reception part (4b) which exchange data therebetween through non-contact communication using electromagnetic induction; and an image display device (8) which displays an image based on the data thus received. With this configuration, it is possible to make communication performed by the first transmission part (3a) and the first reception part (3b) communication with higher speed, larger volume, and higher reliability.Type: GrantFiled: January 22, 2009Date of Patent: February 19, 2013Assignees: Hitachi, Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Ken Takei, Futoshi Furuta, Hiroshi Kageyama
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Patent number: 8368311Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: GrantFiled: July 5, 2012Date of Patent: February 5, 2013Assignees: Hitachi, Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
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Publication number: 20120274223Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: ApplicationFiled: July 5, 2012Publication date: November 1, 2012Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
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Patent number: 8242698Abstract: The present invention overcomes image defects such as the brightness inclination or smears by reducing the line resistance of a power source bus line which supplies electricity to organic EL elements. A plurality of pixels which are arranged in a matrix array is connected to power source lines, and the plurality of power source lines are connected to a power source bus line. Both ends of the power source bus line are connected to a power source part via a FPC. By supplying electricity to both ends of the power source bus line from the power source part, the line resistance of the power source bus line can be reduced.Type: GrantFiled: February 27, 2007Date of Patent: August 14, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Naoki Tokuda, Hiroshi Kageyama, Masamitsu Furuie
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Patent number: 8233105Abstract: In order to restrain increase in frame area caused along with a larger number of channels to a minimum, there is provided an image display device that adopts a communication method in which a signal is transmitted/received with the use of electrostatic capacitance coupling. A first board includes: a tabular first power supply line, a tabular second power supply line, a semiconductor element, and a tabular first electrode group. A second board includes: a tabular second electrode group and a tabular common electrode. In a state where the first board and the second board are laid on each other, the first electrode group overlaps the second electrode group while one of the first power supply line and the second power supply line overlaps the common electrode.Type: GrantFiled: April 3, 2009Date of Patent: July 31, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hiroshi Kageyama, Futoshi Furuta, Ken Takei
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Publication number: 20120162180Abstract: An image display is provided with a display area including pixels, each including illuminating means. A control circuit turns the illuminating means of the pixels on and off. A first terminal of a capacitor is connected to an input terminal of the control circuit. An image signal voltage generation circuit generates image signal voltages and a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. A connector is provided for connecting either one of the image signal voltages or the pixel drive voltages to a second terminal of the capacitor. As such, an amount of drive current for the pixels is controlled in accordance with both the pixel drive voltage and the image signal voltage.Type: ApplicationFiled: March 6, 2012Publication date: June 28, 2012Inventors: Hajime AKIMOTO, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu
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Patent number: 8207918Abstract: During a first period of a set period, a reset switch element of each pixel is turned on to converge a voltage at a control electrode of a TFT to a predetermined voltage, and a step signal having a first voltage level is supplied from a step signal generation circuit. During a second period of the set period, the reset switch element is turned off, and a step signal having a second voltage level is supplied from the step signal generation circuit, whereby a voltage exceeding a second power supply voltage or a voltage exceeding a voltage range supplied from a signal driver section is input as a characteristic value set voltage to the control electrode. Accordingly, even when a relationship between a gate voltage and a drain current of the thin film transistor exhibits a hysteresis characteristic, uniform display can be achieved.Type: GrantFiled: June 9, 2009Date of Patent: June 26, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Tohru Kohno, Takahide Kuranaga, Hiroshi Kageyama, Hajime Akimoto
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Patent number: 8184252Abstract: An image display device includes a display panel having plural pixels and a second board having a transmitting electrode, the display panel having a first substrate that is disposed so as to overlap the second board, each pixel having a pixel electrode and a counter electrode, and the counter electrode being formed in a planar shape and being commonly provided to the pixel electrodes of each pixel; the counter electrode being divided into a portion A corresponding to the transmitting electrode of the second board and a portion B other than it, and the portions A and B of the counter electrode being connected to a common voltage through resistors. The portion A of the counter electrode constitutes the receiving electrode, and the portion A of the counter electrode acting as the receiving electrode is connected to a receiving circuit in the display panel through a decoupling capacitor.Type: GrantFiled: July 27, 2009Date of Patent: May 22, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Futoshi Furuta, Hiroshi Kageyama, Ken Takei
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Patent number: 8159427Abstract: An image display is provided with a display area including pixels, each including illuminating means. A control circuit turns the illuminating means of the pixels on and off. A capacitance is provided having a first node connected to an input terminal of the control circuit. A display signal voltage generation circuit generates display signal voltages for the pixels, while a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. In addition, a connector is provided for connecting either one of the display signal voltages or the pixel drive voltages to a second node of the capacitance.Type: GrantFiled: August 1, 2011Date of Patent: April 17, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Hajime Akimoto, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu
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Patent number: 8102353Abstract: The present invention is to prevent a capture error of display data caused by a delay due to a built-in driving circuit in a display device with a built-in driving circuit.Type: GrantFiled: September 25, 2007Date of Patent: January 24, 2012Assignee: Hitachi Displays, Ltd.Inventors: Katsumi Matsumoto, Kozo Yasuda, Hiroshi Kageyama
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Patent number: 8063553Abstract: To reduce brightness variation by wiring resistance of an upper part transparent electrode in an organic luminescence element, a stripe-shape first auxiliary wiring 11 extending in a direction parallel to a signal line is formed on the upper part transparent electrode, by a precise mask vapor deposition method. Then, a stripe-shape second auxiliary wiring 12 extending in a direction parallel to a scanning line is formed by a precise mask vapor deposition method.Type: GrantFiled: March 4, 2008Date of Patent: November 22, 2011Assignee: Hitachi Displays, Ltd.Inventors: Shingo Ishihara, Eiji Matsuzaki, Hiroshi Kageyama
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Publication number: 20110279434Abstract: An image display is provided with a display area including pixels, each including illuminating means. A control circuit turns the illuminating means of the pixels on and off. A capacitance is provided having a first node connected to an input terminal of the control circuit. A display signal voltage generation circuit generates display signal voltages for the pixels, while a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. In addition, a connecter is provided for connecting either one of the display signal voltages or the pixel drive voltages to a second node of the capacitance.Type: ApplicationFiled: August 1, 2011Publication date: November 17, 2011Inventors: Hajime AKIMOTO, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu